In a statement, the Irish Department of Foreign Affairs said, along with the Irish Embassy in France, they were "following up on all concerns which have been expressed to them as to the welfare of Irish citizens who may have been in the Nice area yesterday evening.

"We have particular concerns for the welfare of one Irish citizen, which we are following up urgently."

"The people who carried out this attack want to create fear and division," they said.

"Their actions have resulted in the loss of many lives of people of different nationalities. Their acts are futile and will serve only to strengthen our resolve and determination that democratic means are the only way forward."

The taoiseach, Mr Kenny, described it as an "act of madness".

Image copyrightLuca BrunoImage caption
Floral tributes at the scene of the attack

"I'd like to, on behalf of the government and the Irish people, extend our sincere and deepest sympathies to President Hollande and the French people," he said.

A book of condolence for the victims of the Nice attack is due to be opened at Belfast City Hall on Monday.

Belfast City Council said the City Hall will be illuminated in the colours of the French flag, as a mark of solidarity with the French people on Friday evening.

The British and Irish embassies in France have both issued telephone helpline numbers for any of their citizens who have been affected by the Nice attack